Command Groups
Table 2-37: RF C
ommands
Item Description
MARKER:M<x>:AMPLitude:
ABSolute?
This query ret
urns the actual amplitude (vertical) value of the either of the two manual markers
that are available for frequency domain traces, in dBm.
MARKER:M<x>
:AMPLitude:
DELTa?
This query returns the delta amplitude (vertical) value of either of the two manual markers that
are available for frequency domain traces, in relation to the Reference Marker.
MARKER:M<x>:FREQuency:
ABSolute
This command specifies the actual frequency (horizontal) value of either of the two manual
markers tha
t are available for frequency domain traces.
MARKER:M<
x>:FREQuency:
DELTa?
This query
returns the delta frequency (horizontal) value of either of the two manual markers
that are available for frequency domain traces, in relation to the Reference Marker.
MARKER:M<x>:NOISEDensity?, This command returns the noise density of the RF_NORMal trace at the specified marker
position in <RF Units>/Hz units, where <RF Units> are the units specified by the command
RF:UNIts
.
MARKER:
M<x>:PHASENoise?
This com
mand returns the phase noise of the RF_NORMal trace at the specified marker
position in dBc/Hz units.
MARKER:
MANual
This command switches on or off the manual markers a and b that are available for frequency
domain traces.
MARKER:PEAK:EXCURsion This command specifies the excursion value, in user-selected units, for the frequency domain
trace a
utomatic peak markers. You can select the units with the command R F:UNIts.
MARKER:PEAK:MAXimum
This c
ommand specifies the maximum number of frequency domain trace peaks that should
have automatic markers associated with them. T his can be a number between 1 and 11.
MARKER:PEAK:STATE This command switches on or off the automatic peak markers that are available for frequency
domain traces. The default is 1 (on). There are up to 11 automatic markers.
MARKER:PEAK:THReshold
This command specifies the threshold value, in the same vertical units as the source waveform,
of t
he automatic peak markers available for frequency domain traces. (Use the RF:UNIts
to specify the units.)
MAR
KER:REFERence
This command changes the Center Frequency to the frequency indicated by the Reference
Marker, in effect moving the Reference Marker to the center of the screen.
MARKER:REFERence:
AMPlitude?
This query returns the a mplitude (vertical) value of the Reference Marker in dBm when markers
ar
e turned on (using the c ommand MARKER:PEAK:STATE or MARKER:MANual).
MARKER:REFERence:
F
REQuency?
T
his query returns the frequency of the Reference Marker when the frequency domain
trace markers have been turned on (using either the c ommand MARK ER:PEAK:STAT E or
MARKER:MANual).
MARKER:TYPe
This command specifies the m arker type (either DELTa or ABSolute) to use when the automatic
markers for the frequency domain traces are turned on. To turn on the automatic markers,
use the command MARKER:PEAK:STAT E.
RF:CLIPPing? Returns a boolean indicating whether the RF input is “clipping” due to input over/under-range
detection.
RF:DETECTionmethod:MODe This command specifies whether the RF detection within the oscilloscope occurs automatically
or manually. T he default is AUTO. If you set the detection method mode to MANual, you
are then able to use the related
RF:DETECTionmethod commands to specify detection
method options for the frequency domain traces (the options are
MINUSpeak, SAMple,
PLUSpeak and AVErage).
2-52 MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual
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